JPH0384831A - Plasma display panel - Google Patents

Abstract

PURPOSE:To decrease the probability that a longitudinal electrode is covered by a barrier, even with an increase in the barrier width caused by dislocation of the barrier or paste drop, etc., or decrease in the width of the longitudinal electrode, etc., so as to prevent lack of picture elements that may arise from stoppage of electric discharge by adopting such configuration that adjacent picture elements bite into one another. CONSTITUTION:The arrangement and configuration of picture elements is stretched to the side of line electrodes 3 more than conventional ones and the picture elements are so arranged as to bite into one another. As to one side of a triangle connecting the centers of the picture elements 11 which side is parallel to longitudinal electrodes 4 and the distance x from the crossing point of a barrier 9 to the center, the distance (x) is half the distance (z) from the parallel side to the apex of the triangle within normal arrangement of rectangular picture elements. When the configuration of the picture elements 11 is such that they bite into one another to the side of the longitudinal electrode 4, then the distance (x) is less than half the distance (z) and in extreme cases the distance (x) is zero; the probability that the longitudinal electrodes are covered by the barrier due to slight dislocation of the barrier, broadening of the barrier width or narrowing of the width of each longitudinal electrode is therefore decreased and electric discharge is stably maintained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to the dot matrix type used in personal computers and office workstations, which have been rapidly progressing in recent years, and wall-mounted televisions, which are expected to develop in the future. Regarding the structure of plasma display.

[Conventional technology]

Examples of the structure of a conventional plasma display are shown in FIGS. 9A and 9H. In Figures 9A and B, A is a plan view and B is a of A.
21 is a first insulating substrate made of glass or the like; 22 is a second insulating substrate also made of glass or the like;
23 is a column electrode, 24 is a row electrode, 25.26 is an insulator, 2
7.30 is an MgO film which is a protective layer, is a discharge gas space, 2
9 is a barrier, and 31 is a pixel.

When an AC voltage of about 1 oov or more is applied between the column electrode 23 and the row electrode 24, light is emitted at the intersection of the column electrode 23 and the row electrode 24, so that dot matrix display can be performed.

Here, the cell barrier 29 is generally 1. It is created by applying multiple layers of paste containing glass or the like in the shape of a barrier pattern using screen printing, and then firing it.

[Problem to be solved by the invention]

In the conventional technology as described above, the shape of the pixel is generally a quadrilateral with each side parallel to a row electrode or a column electrode, and is arranged like an eye on a substrate. In the case of Figure 9, if the barrier shifts in the direction of the column electrode due to misalignment, distortion of the screen during screen printing, etc., part of the row electrode will be covered by the barrier, and in extreme cases, the row electrode will be covered by the barrier. There is a drawback that all the electrodes are covered with a barrier and no discharge occurs. Furthermore, if the barrier width increases due to sagging of the paste pattern, sagging of the paste during paste firing, etc., the row electrodes will still be covered with the barrier, resulting in a disadvantage that no discharge will occur.

Although the explanation here is based on the conventional example shown in FIG. 9, it is not necessarily limited to the example shown in FIG. There are problems as mentioned above.

Means for Solving 1 Problem] According to the present invention, there is provided a discharge gas space and two insulating substrates placed in parallel so as to sandwich the discharge gas space, and the striped row electrodes and the striped row electrodes are arranged in parallel. Striped column electrodes, which are perpendicular to the striped row electrodes and electrically insulated from the striped row electrodes, are arranged on the surface of the insulating substrate facing the discharge gas space. Each pixel partitioned by a barrier formed on one insulating substrate is arranged in a so-called arrangement in which the adjacent pixel rows (or columns) are shifted by half a pixel along the pixel rows (or columns) from the grid-like arrangement of the substrate. It has a triangular pixel arrangement, and furthermore, each pixel interdigitates toward the row electrode, and the center point of the intersection of the barriers separating adjacent pixels connects the center points of three adjacent pixels. A plasma display characterized by being located inside a triangle, and at a position measured from one side of the triangle parallel to the row electrode, less than half the distance between this side and the vertex of the triangle opposite to this side. You get a panel.

[Effect]

The present invention solves the problems of the prior art by using the above-described configuration. That is, the arrangement and shape of each pixel is extended toward the column electrodes compared to the conventional method, and is shaped so that they are embedded into each other. That is, as shown in Fig. 8, if we look at the distance X between the side y of the triangle connecting the pixel centers and parallel to the row electrode, and the center of the intersection of the barriers, we can see that In a rectangular pixel array, the distance X is 1/2 of the distance 2 between the side y and the vertex of the triangle. On the other hand, if the shape of each pixel is made to embed into the row electrode, the distance X will be less than 1/2 of the distance 2, and in an extreme case, the distance X will be zero. By doing this, the probability that the row electrode will be covered by the barrier due to the position of the barrier being slightly shifted, the width of the barrier being widened, or the width of the row electrode becoming thinner is reduced, and the discharge can be maintained stably. It became so.

In addition, especially when using row electrodes with discharge on both sides, even if the row electrodes spread due to firing sag of the paste forming the barrier, they are less likely to cover the row electrodes, which helps stabilize the discharge. It turned out to be very effective. Hereinafter, the present invention will be explained in more detail with reference to Examples.

〔Example〕

Next, the present invention will be explained with reference to the drawings. FIG. 1 is a plan view (FIG. 1A) and a cross-sectional view (FIG. 1B) of a first embodiment of the present invention, where 1 is a first insulating substrate made of glass with a thickness of 2 mm, and 2 is also a first insulating substrate made of glass with a thickness of 2 mm. A second insulating substrate made of glass with a thickness of 2 mm, 3 a column electrode with a width of 100 microns made of a transparent NESA film (a transparent thin conductive film whose main component is Sn02), and 4 a column electrode with a width of 300 microns made of an A1 thin film. 5 and 6 are insulators made of Al2O3 thin film with a thickness of 2 microns, 7 is an MgO film with a thickness of 0.5 microns that protects the upper part of the insulator 5, 8 is a discharge gas space, 9 10 is a barrier separating each pixel, 10 is a phosphor, and 11. are hexagonal pixels partitioned by barriers 9.

As is clear from FIG. 1, the pixel 11 has a hexagonal shape, unlike the conventional example, and its apex cuts into the adjacent pixel row toward the row electrode 4. When compared with FIG. 8, the distance X is 1/4 of the distance Mz in the case of FIG. 1. Although this value varies depending on the pixel design, it is always less than 1/2. With this pixel configuration,
Even if the position of the barrier is shifted or the width of the barrier is increased due to sagging of the paste, each row electrode is no longer covered by the barrier, and the discharge is no longer stopped.

In addition, the permissible range of displacement of the barrier is widened, which is very advantageous in panel manufacturing. In this case, there is no need to make the designed thickness of the barrier thinner than in the conventional example, so there is an advantage that the same conventional method can be used for manufacturing the barrier itself.

FIG. 2 shows a second embodiment of the present invention. Like the first embodiment, FIG. 2A is a plan view, and FIG. 2B is a sectional view, and the pixels 12 are hexagonal like the first embodiment. However, unlike the first embodiment, two sides of the hexagon are parallel to the row electrodes 4. In this case as well, as is clear from FIG. 2, each pixel 12 bites into the pixel in the adjacent row, and especially in the case of pixel 12 including the row electrode 4 over its entire width. There is. Therefore, there may be misalignment between the row electrodes 4 and the barrier 9, and the row electrodes 4 may be
Even if the width of the barrier 9 becomes narrower or the width of the barrier 9 becomes wider, the row electrode 4 is located sufficiently within the pixel 4, so that the discharge characteristics are very stable. Note that in this case, when compared with FIG. 8, it can be seen that the distance X is zero.

FIGS. 3A and 3B show a third embodiment of the present invention, where A is a plan view;
B is a cross-sectional view of the a-a' section in A. The 0th row electrode is not a double-sided discharge type (discharge between row electrode and column electrode), but two independent row electrodes 4 inside the pixel 13. , 18 passing through the row electrodes, and discharge is caused between the row electrodes.The shape of the pixel is the same hexagon as in the first embodiment of the present invention.

Even when the row electrodes are of this type, by making the pixels hexagonal, there is an effect of widening the tolerance range in manufacturing with respect to the shift of the barrier 9 and the increase in the barrier width due to paste sag.

As described above, by making the pixel shape hexagonal based on the basic concept of the present invention, it was possible to realize a plasma display having the above-mentioned effects. Further, by making the pixel shape hexagonal, there were also advantages of improved visibility and improved spatial resolution.

FIGS. 4A and 4B show a fourth embodiment of the present invention, and the parts denoted by the same numbers as in FIG. 1 are almost the same. Also, as in FIG. 1, A is a plan view and B is a cross-sectional view.
It is a diamond-shaped square, and has a shape that digs deeply into the row electrode 4. When compared with FIG. 8, the distance x is zero. Therefore, this embodiment has the same or better effects than the first embodiment of the present invention.

5A and 5B show a fifth embodiment of the present invention, in which a pixel 15
is a square as in the conventional case, but as shown in the figure, each pixel is deeply embedded in the pixels adjacent to the left and right, and the distance X is also zero in this case. As shown in FIG. 5, while using the row electrodes 4 with discharge on both sides, the pixels 15
occupies the entire width of the row electrode, so even if the position of the barrier shifts or the width of the row electrode expands due to paste sag, etc., there is almost no effect.

FIGS. 6A and 6B show a sixth embodiment of the present invention.

The six pixels 16 having the same numbers as in FIG. 1 are hexagonal pixels, and a part of the hexagon cuts into the row electrode 4. Therefore, it has the same effect as the first embodiment of the present invention. In the case of FIG. 6, the distance Mx corresponding to FIG. 8 is approximately 1/3 of the distance MZ.

7A and 7B show a seventh embodiment of the present invention, in which the pixel 17
is circular. Examples where the pixel shape is circular have been known for a long time, but in this example, the circular pixels are particularly embedded into each other, so that the same effect as described in the first example is achieved. It is. In the case of Figure 7,
The distance X corresponding to FIG. 8 is approximately 173 of the distance 2.

In the above embodiments, the case where the row electrodes and column electrodes are on two different substrates has been described, but the invention is not limited to this, and the electrode configuration is such that the row electrodes and column electrodes are arranged on one substrate. The present invention is also applicable to this case.

The present invention also applies to an electrode configuration in which a discharge is performed between one row electrode and one column electrode, as in the conventional example, instead of a discharge type in which a sustain discharge is performed between a pair of row electrodes. Needless to say, it can be applied.

In the above embodiments, the electrodes, insulating layer, and MgO layer are formed using thin films, but they do not necessarily need to be formed using thin films, and may be formed using a thick film process.

〔Effect of the invention〕

As explained above, the present invention differs from the conventional art in that each pixel is embedded into adjacent pixels, thereby increasing the barrier width or decreasing the row electrode width due to misalignment of the barrier position or paste sagging. Even if such problems occur, the row electrodes are less likely to be hidden by the barrier, and pixel chipping due to discharge stop can be prevented. Therefore, the alignment margin between the row electrode and the barrier can be increased, and the margin for the width of the row electrode and the width of the barrier can also be increased, which is very advantageous in manufacturing the panel.

Furthermore, by making the pixel shape circular, hexagonal, or polygonal such as hexagonal, the corners of the pixel become less noticeable, and a plasma display panel with excellent display quality can be obtained.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1A and 1B are a plan view and a sectional view of a first embodiment of a plasma display panel according to the first embodiment of the present invention, and FIGS. Figures A and B are respectively a plan view and a sectional view of different embodiments of the plasma display panel of the present invention, Figure 8 is a diagram for explaining the basic contents of the present invention, Figure 9 is a diagram for explaining the basic content of the present invention, and Figure 9
Figures A and B are a plan view and a sectional view of a conventional plasma display panel. 1.21...First insulating substrate, 2,22...Second insulating substrate, 3,23...Column electrode, 4,18.24...Row electrode, 5,6,25.26... ...Insulator, 7,27°3
0...M, O film, 8,28...Discharge gas space, 9°29...Barrier, 10...phosphor, 11-17.31
...pixel.

Claims (1)

[Claims] It has a discharge gas space and two insulating substrates placed in parallel to sandwich the discharge gas space, and has a striped row electrode and a striped row electrode that is perpendicular to the striped row electrode. Electrically insulated striped column electrodes are arranged on the gas discharge space side surface of an insulating substrate, and the discharge gas space is partitioned by a barrier provided on at least one of the insulating substrates. of pixels,
In a plasma display panel that has a so-called triangular pixel array in which the centers of adjacent pixels are arranged at the vertices of a triangle, each pixel mutually bites into the pixels in the adjacent row, and the three adjacent pixels The center point of the intersection of the barriers dividing the space is located inside the triangle connecting the center points of three adjacent pixels, and the distance between this side and this side is longer than one side of the triangle parallel to the row electrode. A plasma display panel characterized in that the plasma display panel is located at a position less than half the distance from a vertex of a triangle facing the .